On Tue, Sep 16, 2014 at 11:25:19AM -0800, Lou Logan wrote: > On Tue, 16 Sep 2014 07:34:14 +0200, Clément Bœsch wrote: > > > On Mon, Sep 15, 2014 at 06:56:29PM -0800, Lou Logan wrote: > > > +@item > > > +Create a radial gradient that is the same size as the input: > > > +@example > > > +geq=lum=255*gauss((X/W-0.5)*3)*gauss((Y/H-0.5)*3)/gauss(0)/gauss(0),format=gray > > > +@end example > > > + > > > > You may mention @ref{vignette} filter here so people don't end up using it > > verbatim. > > Mentioned. > > > > +@item > > > +Create a linear gradient to use as a mask for another filter, then > > > +compose with @ref{overlay}: > > > +@example > > > +geq=lum=255*(Y/H),format=gray[grad];[0:v]boxblur=4[blur];[blur][grad]alphamerge[alpha];[0:v][alpha]overlay > > > > This filtergraph is complex and very input dependant; please provide a > > complete command line as an example > > Added. I actually prefer complete examples. > > > New version inserted below: > > From 3ec5557f7ffd4e2ce6ddc5c06d1e5d5d07013536 Mon Sep 17 00:00:00 2001 > From: Lou Logan <l...@lrcd.com> > Date: Mon, 15 Sep 2014 18:07:09 -0800 > Subject: [PATCH] doc/filters: add geq gradient examples > MIME-Version: 1.0 > Content-Type: text/plain; charset=UTF-8 > Content-Transfer-Encoding: 8bit > > Radial gradient by Víctor Paesa. > Linear gradient by Paul Gentemann. > > Also-by: Víctor Paesa <victorpa...@googlemail.com> > Also-by: Paul Gentemann <beriu...@gmail.com> > Signed-off-by: Lou Logan <l...@lrcd.com>
LGTM [...] -- Michael GnuPG fingerprint: 9FF2128B147EF6730BADF133611EC787040B0FAB There will always be a question for which you do not know the correct answer.
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